I just did the axle under my 1988 16' and copped out and ordered it from Scamp. I probably could have saved some bucks by getting it somewhere else but I wanted to get one that I knew would work and be done with it and go camping. It fits and looks great although I did have to move the two wire grounding lugs forward (actually had to replace them as they were seized/galled up) to clear the new, longer bracket. And, since the new axle is bolted and not welded to the frame I am not going to weld the little floor support tab in the center to the axle. My plan is to instead weld a "T" to the top of the axle and let it support, but not be attached to, the floor framing.
I started out carefully grinding at the welds on the old axle with cutting wheels in a die grinder but that got old quick. I quit that and just cut the bracket away with a torch from the axle getting the axle out of my way. I then attacked the remaining bracket pieces still attached to the frame with the torch and a larger grinder. There was no point in trying to be careful with the old axle & bracket, they are toast.
Actually, since I had to buy new
tires & rims and still have the old that are in pretty goor shape, I am going to cut off the old spindles and weld them to a piece of 2 1/2" pipe to make a straight axle. Some new perches, springs and hangers and presto, new
light duty trailer axle. Like I need another project!